Milling machine attachment



May 23, 1950 W. C. HUNGERFORD MILLING MACHINE ATTACHMENT Filed Spt. 11, 1945 2 Sheets-Sheet 1 I w. c. HUNGERFORD 2,508,390

MILLING MACHINE ATTACHMENT May 23, 1950 2 Sh eets-Sheet 2 Filed Sept. 11, 1945 INVENTOR. Mzz/wa C'Awaaemw Patented May 23, 1950 UNITED STATES PATENT OFFICE .MILIIING MAGHINE ATTAGHMENT Willard Q. ll up gerford, Inglewood, Calif. Applicatlon September-11, 1945, Serial No. 615,664

7 Claims.

r 1 in tion relates. e c m lin m chin s and more particularl in a slatt ng ttachment o such machines.

as he Princip l objects. o this nven io is, to pro ide a s mpl slo n e i e and on whic be economic lly made and, n rp ate n,

ligehyl the: bar ma h supported in one of several locations when the device is secured in arious st cl an u ar positions,

A u ther "importan o jec o thi .inventionzis do simple hcl ovel'meansior oneratively onn tins he de ice to h mi l n machine ive s n le ;or reci rocat n the s o er a still fur e mpor ant ob e t of h s invem tion is to pro ide ei eausof adjustin the rank o ri the thr the eofand t e c ne s que t e inroeatine stroke at he cutter.

with thes and other obj cts :view, as will ppear he ei ter, have dev sed slottin means. or sl ttin attachment p millin ma: hinesz as wi be he e n iter descr bed iindetaii dpar cul rly set. rth in the appended claims, reference bei had to the accom nyi g drawns and to the haracters of reference thereon, which form ap rt of t s application, :'in which:

a. fra menta y sidee1evationalview of a milling machine embodying my hivention :in a p eierred .iorm;

Fig. 2 is a fragmentary :irontelevatimal mew thereof;

Fig. 3 is a sectional view thereof in plan taken through 3-3 of Fig. 1; s

Fig. 4 is a fragmentary sectional elevational view thereof, taken through 4-4 of Fig. 1, show ing the back side of the cutter head; and,

Fig. 5 is another fragmentary sectional elevational view thereof, showing the crank means for operating theslotting mechanism.

The milling machine, shown in the drawings, is of standard or ncqnventional construction, consisting essentially of a frame I ,an overarm Z, a bracket ,3 depending from the end of the arm, a spindle 4, and a work supporting carriage '5. The spindle has a hollow tapered bore 4 for re- 2 c ivine h usua cu ter or cu te bare ower nd. of the brac e a bor 3 hic n estric withthe spindle.

lhe cutter head guide or supporting member ll of my device is supported by and at the inner side of the bracket 3, and has a boss ll which extends into (and is rotatably mounted in the bore 3% of the bracket.

At the outer side of the bracket 3 is a collar or cap l2 having a reduced locating portion 12* Whic s i to hut ir m e o t d, Qf h bore 3%. The cap is secured to the boss. Ila by means of a cap. screw 13. Thelcap is non-rotate ably connected to. the boss lie of the cutter head guide or supporting member by means .of a dowel pi L The peripheral portion of the cap 12 is graduated, as indicated by l2, to indicate the angular position of the guide II with respect to the bracket, the hub '3? of the bracket having an in-: dex mark 3 .to facilitate the location of the guide at the desired angular position. The accuracy of the angular position of the guide depends upon the f xedness of the bracket 3. This bracket is non-rotatably secured to the arm 2. If two of such arms are provided, as in some milling mae chines, the bracket 3 is automatically prevented om r a n nd needs no o i e o a n means.

The guide ll isprovided at its inner side with a dovetail channel "li in which is reciprocally mounted a correspondingly shaped portion [5 of a cutterhead It, "the reciprocation oi the head being transversetothe rotating-axis of the g At the-inner side of the cutter head i 5 is provided a slot {5 which is positioned at right angles to both the direction of reciprocationof the head it: and the rotating axisof the guide.

The means for reciprocating the cutter head 1-5 is shown .in Figs. :1, 3, and :5, and consists primarilyoi acrank support .2sl and acrank memher The cranksupport consists of a tapered han la whichz s adapt d 'iififibz l ilo thetapered cess twp these die A. At the outer endpf he-termed ha e. Yi 'fil a as M wh ch ma be srar e m mhete "-Ti ??ll? 1 he et as rsl wnean membe 2.? is .aflai ie s lari a ed m a d pivQW y merited h r cnsea ene i a exe near the peripheral portion of the flange 29 The pipe taleonuec o 9 th rank member to tha qe of th fla is'b mean of can s ew 23 se t d i on; the backsid of thefianse- ,The ohno teap anoriion o the c n membe i ad justably secured to the face of the flange by means of a second cap screw 24, which extends through an arcuate slot 2| also from the back side of the flange. The center of the curvature of the slot 2l is the axis of the pivotal mounting of the crank member. Near the third apeX of the crank member is a crank pin 22*, the axis of which is positioned at one side of the line connecting the pivotal axis of the screw 23 and the securing screw 24. Over the pivot pin 22 is a square bearing block 25 which fits into the slot l5 of the cutter head.

A variation of the stroke of reciprocation of the cutter head may be easily made by the unloosening of the cap screw 24 and shifting the same about the pivot screw 23, thereby shifting the pivot pin 22 with respect to the axis of revolution of the spindle.

The head I5 has bores I5 and [5 which extend parallel to the direction of reciprocation, but are located at the opposite sides of the axis of rotation of the guide. A cutter bar 38 is adapted to be positioned in either of these bores and may be secured therein by set screws 32. The purpose of positioning the cutter bar 3i at one side of the rotating axis of the guide is to locate thecutting means close to the work to be slotted or otherwise cut, and without interfering with the work-holding means on the carriage 5 when the cutter head is positioned to reciprocate in an angular direction, as indicated by dotted lines in Fig. 2.

Though I have shown and described a particular construction, combination, and arrangement of parts and portions, I do not wish to be limited to the same, but desire to include in the scope of my invention the construction, combination, and arrangement substantially as set forth in the appended claims.

I claim:

1. In an attachment for milling machines having a projecting spindle, an overarm, and depending bracket means disposed outwardly beyond the end of the spindle, a guide adapted to be mounted adjacent the inner end of the bracket, a. head slidably mounted on the guide, and a crank adapted to be carried by the spindle and connected to the head for reciprocating the head on the guide.

2. In an attachment for milling machines having a projecting spindle, an overarm, and depending bracket means disposed outwardly beyond the end of the spindle and having a bore concentric with the spindle, a guide having a boss adapted to be rotatably adjusted in the bore, means disposed against the outer side of the bracket means for adjustably securing the boss therein, a head slidably mounted on the guide, a crank adapted to be carried by the spindle and connected to the head for reciprocating the head on the guide.

3. In a milling machine having a projecting spindle, an overarm above the spindle, and depending bracket means at the end of the arm and disposed outwardly beyond the end of the spindle, said bracket having a guide, a head slidably mounted thereon, said head having a bore at one side of and transversely of its axis, a cutting-tool supporting bar adjustably secured in the bore, and a crank on the spindle and connected to the head for reciprocating the head on the guide.

4. In a milling machine having a projecting spindle, an overarm above the spindle, anddepending bracket means at the end of the arm and disposed outwardly beyond the end of the spindle, said bracket having a guide rotatably adjustable coaxially with the spindle and disposed between said bracket means and said spindle, a head slidably mounted thereon transversely of its rotating axis, a crank carried by the spindle and connected to the head for reciprocating the head on the guide, said head having a bore transversely with respect to its rotating axis, and a cuttingtool supporting bar adjustably securable in said bore.

5. In a structure of the class described, a rotatable spindle having a supporting flange at one end, a plate-like crank member pivotally mounted at one end against the face of the flange and near the peripheral portion thereof, the flange having an arcuate slot near the peripheral portion at the opposite side of the rotating axis of the spindle, bolt means adjustably securing the opposite end of the crank member to the face of the flange through said slot, a crank pin extending outwardly from the crank member intermediate the pivotal axis thereof and the bolt means and at one side of the line connecting said pivotal axis and the bolt means.

6. In a milling machine having a projecting spindle, an overarm above the spindle, and depending bracket means at the end of the arm disposed outwardly beyond the end of the spindle and having a bore in axial alignment with said spindle, a guide disposed between said bracket means and the spindle and having a boss rotatably adjustable in the bore, clamping means disposed against the outer side of said bracket means and engageable with the boss for clamping said guide against said bracket means in different positions of angular adjustment, a head slidably mounted on the guide transversely of the axis of the boss, and a crank carried by the spindle and connected to the head for reciprocating the head on the guide.

7. In a milling machine having a projecting spindle, an overarm above the spindle, and depending bracket means at the end of the arm disposed outwardly beyond the end of the spindle and having a bore in axial alignment with said spindle, a guide disposed between said bracket means and the spindle and having a boss rotatably adjustable in the bore, a cap disposed against the outer side of the bracket member and provided with a reduced portion engaged in said bore to adapt the cap for rotatable adjustment on the bracket means, interengaging means on the boss and the cap for connecting the guide and cap for unitary angular adjustment in said bore, a clamping screw engageable with and adapted to draw said boss and said cap together to clamp the same in diiferent positions of angular adjustment, a head slidably mounted on the guide transversely of the axis of the boss, and a crank carried by the spindle and connected to the head for reciprocating the head on the guide.

WILLARD C. HUNGERFORD.

REFERENCES {JITED The following references are of record in the file of this patent:

UNITED STATES PATENTS France Jan. 30, 1925 V 

